Ruby Chipmunk Integration Gem 'gosu-examples' が参考になる。bundle exec gosu-exapmles で OK! chipmunk_and_rmagick.rb を実行するとよい。chipmunk_and_rmagick.rb のコピペ。 # Encoding: UTF-8 # Based on the C Demo3 demonstration distributed with Chipmunk. # Also with some help from the chipmunk_integra…